Materials Selection Details
[Permitted Repetition]
Materials−2
■
When continuous-speed status and motor stop status is repeated
●
In operating conditions such as those shown below, the effective value of the armature current of the
motor is at a frequency below the rated armature current of the motor.
Time
Time
If the operating cycle is considered as ‘t’, the usable range can be determined as follows:
I
P
:
Instantaneous maximum stall armature current
I
R
:
Rated armature current
I
L
:
Current corresponding to load torque
When cycle time (t) is predetermined, I
p
, t
a
, t
b
appropriate in the above formula are required.
✍
When actually determining the system drive mode, it is recommended to calculate the load margin and suppress it to Trms
≦
0.7TR
■
When the motor repeats acceleration, deceleration, and stop status
●
For the operating status shown below, the value of permitted repetitions n (times/min) is displayed by following equation.
Time
Time
[times/min]
T
R
:
Rated torque
t≧ [s]
I
P
2
(t
a
+t
b
)+I
L
2
t
s
I
R
2
サーボモータ電流
サーボモータ
回転速度
T
P
-T
P
T
L
t
N
→
→
n=2.86×10
2
× × ×T
R
2
1
T
P
3
N(J
M
+J
L
)
T
P
2
−T
L
2
サーボモータ電流
サーボモータ
回転速度
I
P
-I
P
I
L
t
N
t
a
t
s
t
b
→
→
Servo Motor Current
Servo Motor Rotating Velocity
Servo Motor Current
Servo Motor Rotating Velocity
Содержание Q1AA04003D
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